Store aqueous solutions with durable and autoclavable Thermo Scientific™ Nalgene™ Square Polycarbonate Bottles with Closure. These ultra clear bottles provide extra clarity, helping you to easily identify the contents inside. Featuring an easy to handle square design, these bottles are also ideal for short-term storage of media. This square design saves valuable space in the freezer to 130 degrees C (275 degrees F). The molded-in graduations make dispensing easy. Bottles include leakproof polypropylene (PP) screw top caps. In order to ensure leakproof performance, use only the caps provided. Remove cap or completely disengage threads before autoclaving. Repeated autoclaving will shorten bottle life.

*The term "leakproof" applies to Thermo Scientific Nalgene products that meet the following criteria: a) Bottle/flask/funnel closure systems with closures smaller than 100mm, after they are filled with water, inverted, withstand air pressure of 2psig for 2 minutes, and no water escapes;. b) Bottle/funnel/flask closure systems of larger than 100mm after they are filled with water, inverted for 15 minutes, and no water escapes. Note: these tests, using other liquids, may not yield the same results. To ensure safe usage, customers are advised to test Thermo Scientific Nalgene bottles and closures under conditions of their planned applications. Thermo Scientific Nalgene products are leakproof at ambient temperature and pressure when used with their Nalgene closures.